Merge branch 'cxgb4-add-mirror-action-support-for-TC-MATCHALL'

Rahul Lakkireddy says:

====================
cxgb4: add mirror action support for TC-MATCHALL

This series of patches add support to mirror all ingress traffic
for TC-MATCHALL ingress offload.

Patch 1 adds support to dynamically create a mirror Virtual Interface
(VI) that accepts all mirror ingress traffic when mirror action is
set in TC-MATCHALL offload.

Patch 2 adds support to allocate mirror Rxqs and setup RSS for the
mirror VI.

Patch 3 adds support to replicate all the main VI configuration to
mirror VI. This includes replicating MTU, promiscuous mode,
all-multicast mode, and enabled netdev Rx feature offloads.

v3:
- Replace mirror VI refcount_t with normal u32 variable in all patches.
- Add back calling cxgb4_port_mirror_start() in cxgb_open(), which
  was there in v1, but got missed in v2 during refactoring, in patch
  3.

v2:
- Add mutex to protect all mirror VI data, instead of just
  mirror Rxqs, in patch 1 and 2.
- Remove the un-needed mirror Rxq mutex in patch 2.
- Simplify the replication code by refactoring t4_set_rxmode()
  to handle mirror VI, instead of duplicating the t4_set_rxmode()
  calls in multiple places in patch 3.
====================

Reviewed-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

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